The current situation is that Ryuki was in the bathroom when Erika came out of nowhere. When she appeared and met Ryuki, she used a hypnosis app on him and took him into a private room in the men's restroom.
"Big Brother Ryuki-kun... hm, that's not fair. I want to go out with you on the weekends too... smooch, smooch."
While Ryuki was acting hollow, Erika poured out her feelings to Ryuki and french kissing him. She continued kissing for a long time before she stopped.
"Puhaa... Hehe, I'll stop here for now, okay? It will be bad if you kept that girl waiting for long time."
Erika had this kind of consideration, but that's all for now. Ryuki thought that Erika might do something; he hoped it wouldn't be too bad.
---
"Hey..."
"Hello, I'm Yachi Erika, Big Brother Ryuki's neighbor," Erika interoduce herself.
Since Ryuki met Erika and told him to bring her with him, he wasn't going to say no.